Journal
ENERGIES
Volume 13, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/en13020462
Keywords
oxygen reduction; air cathode; zinc-air battery; silver; graphene; current density
Categories
Funding
- Chulalongkorn Academic Advancement into its Second Century Project
- Ratchadaphiseksomphot Endowment Fund
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Due to their low cost and very high energy density, zinc-air batteries (ZABs) exhibit high potential for various energy applications. The electrochemical performance of the air-cathode has a decisive impact on the discharge performance of ZABs because the sluggish oxygen reduction reaction (ORR) kinetics increase the overpotential of the air-cathode and hence the performance of ZABs. In this work, reduced graphene oxide decorated with silver nanoparticles (AgNP/rGO) is synthesized using simultaneous reduction of graphene oxide and silver ions. Different amounts of silver loading are examined for the synthesis of AgNP/rGO. The synthesized AgNP/rGO samples are analyzed using a rotating disk electrode in order to investigate ORR activity. Then, the synthesized AgNP/rGO electrocatalyst is applied on a tubular designed zinc-air battery in order to study the performance of the zinc-air battery. Results demonstrate that AgNP/rGO is an efficient and cost-effective ORR electrocatalyst for its practical application in ZABs.
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